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kejadian yangg mungkin muncul sedikitnya 2 angka =
A-A-G
A-G-A
G-A-A
A-A-A
______
4 kemungkinan
maka frekuensi harapan dari 160x pelemparan adalah
4/8 x 160 = 80
A = kejadian muncul paling sedikit dua angka
A = {(A,A,A) (A,A,G) (A,G,A) (G,A,A)}
n(A) = 4
P(A) = n(A/)n(s)
= 4/8
= 1/2
Fh(A) = P(A) × banyaknya percobaan
= 1/2 × 160
= 80